@article{ref1,
title="Transportation cost analysis for sustainability",
journal="IATSS research",
year="1995",
author="Litman, T.",
volume="19",
number="2",
pages="68-78",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0386-1112",
doi="",
url="http://dx.doi.org/"
}